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TUPME015 |
Proposal of Polarized Gamma-ray Source for ILC Based on CSR Inverse Compton Scattering |
1598 |
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- M. Shimada, K. Yokoya
KEK, Ibaraki, Japan
- R. Hajima
JAEA, Ibaraki-ken, Japan
- M. Tecimer
University of Hawaii at Manoa, Honolulu, USA
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The positron source of International Linear Collider (ILC) requires a circular polarized gamma-ray with a flux more than 1016 phs./s and a helical undulator-based gamma-ray source is proposed in the baseline design. Although the undulator scheme is technically feasible, it is not easy for a stand-alone operation because of the required electron energy, ~ 150GeV. In this paper, we propose an alternative method, the inverse Compton scattering with a high-power mid-infrared optical pulse generated from coherent synchrotron radiation (CSR). To achieve the high flux gamma-ray, CSR with a few MHz is stacked in a high-finesse optical cavity made of a photonic crystal. In the proposed scheme, a stand-alone operation is feasible because the electron energy is less than 10GeV.
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